glibc: glibc: Heap Buffer Overflow in `scanf` with `%mc` format specifier and large width

A flaw was found in glibc GNU C Library. This vulnerability occurs when an application uses the scanf family of functions with a %mc format specifier, which is used for dynamically allocating memory for character input, and provides an explicit width greater than 1024. This specific combination c...

SUSE CVE-2026-5450

Calling the scanf family of functions with a %mc malloc'd character match in the GNU C Library version 2.7 to version 2.43 with a format width specifier with an explicit width greater than 1024 could result in a one byte heap buffer overflow...

AZL-83093 CVE-2026-5450 affecting package glibc 2.38-21

Calling the scanf family of functions with a %mc malloc'd character match in the GNU C Library version 2.7 to version 2.43 with a format width specifier with an explicit width greater than 1024 could result in a one byte heap buffer overflow...

DEBIAN-CVE-2026-5450

Calling the scanf family of functions with a %mc malloc'd character match in the GNU C Library version 2.7 to version 2.43 with a format width specifier with an explicit width greater than 1024 could result in a one byte heap buffer overflow...

CVE-2026-5450

Calling the scanf family of functions with a %mc malloc'd character match in the GNU C Library version 2.7 to version 2.43 with a format width specifier with an explicit width greater than 1024 could result in a one byte heap buffer overflow...

CVE-2026-5450

Calling the scanf family of functions with a %mc malloc'd character match in the GNU C Library version 2.7 to version 2.43 with a format width specifier with an explicit width greater than 1024 could result in a one byte heap buffer overflow...

UBUNTU-CVE-2026-5450

Calling the scanf family of functions with a %mc malloc'd character match in the GNU C Library version 2.7 to version 2.43 with a format width specifier with an explicit width greater than 1024 could result in a one byte heap buffer overflow...

CVE-2026-5450

Calling the scanf family of functions with a %mc malloc'd character match in the GNU C Library version 2.7 to version 2.43 with a format width specifier with an explicit width greater than 1024 could result in a one byte heap buffer overflow...

CVE-2026-5450

The GNU C Library (glibc) versions 2.7 to 2.43 are vulnerable to a one-byte heap buffer overflow (CWE-122) when using the scanf family of functions with a %mc (malloc'd character match) format specifier and an explicit width greater than 1024 . This vulnerability is present in multiple products, ...

CVE-2026-5450 scanf %mc off-by-one heap buffer overflow

Calling the scanf family of functions with a %mc malloc'd character match in the GNU C Library version 2.7 to version 2.43 with a format width specifier with an explicit width greater than 1024 could result in a one byte heap buffer overflow...

CVE-2026-5450

Calling the scanf family of functions with a %mc malloc'd character match in the GNU C Library version 2.7 to version 2.43 with a format width specifier with an explicit width greater than 1024 could result in a one byte heap buffer overflow...

CVE-2026-5450

Calling the scanf family of functions with a %mc malloc'd character match in the GNU C Library version 2.7 to version 2.43 with a format width specifier with an explicit width greater than 1024 could result in a one byte heap buffer overflow...

CVE-2026-5450 scanf %mc off-by-one heap buffer overflow

Calling the scanf family of functions with a %mc malloc'd character match in the GNU C Library version 2.7 to version 2.43 with a format width specifier with an explicit width greater than 1024 could result in a one byte heap buffer overflow...

PT-2026-33851

Name of the Vulnerable Software and Affected Versions glibc versions 2.7 through 2.43 Description Calling the scanf family of functions using a %mc malloc'd character match with a format width specifier that has an explicit width greater than 1024 can lead to a one byte heap buffer overflow...

CVE-2026-5450: Heap-based Buffer Overflow

Calling the scanf family of functions with a %mc malloc'd character match in the GNU C Library version 2.7 to version 2.43 with a format width specifier with an explicit width greater than 1024 could result in a one byte heap buffer overflow...

GNU C Library security vulnerabilities

The GNU C Library is an open-source, free C-language compiler program published by the GNU community under the LGPL license. Versions of the GNU C Library from 2.7 to 2.43 contained security vulnerabilities. These vulnerabilities stemmed from the use of %mc and format specifiers with a width...

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Linux Distros Unpatched Vulnerability : CVE-2023-34095

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - cpdb-libs provides frontend and backend libraries for the Common Printing Dialog Backends CPDB project. In versions 1.0 through 2.0b4, cpdb-libs is vulnerable t...

CVE-2023-34095

cpdb-libs provides frontend and backend libraries for the Common Printing Dialog Backends CPDB project. In versions 1.0 through 2.0b4, cpdb-libs is vulnerable to buffer overflows via improper use of scanf3. cpdb-libs uses the fscanf and scanf functions to parse command lines and configuration...